const {src,dest,parallel,series,watch} = require('gulp')
/* const cleanCss = require('gulp-clean-css')
const rename = require('gulp-rename') */
/* const sass = require('gulp-sass'); */
const del = require('del')
const browserSync = require('browser-sync')
const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()
const sass = require('gulp-sass')(require('sass'));
/* const babel = require('gulp-babel')
const swig = require('gulp-swig')*/
const imagemin = require('gulp-imagemin')
const bs = browserSync.create()
const data = {
  menus: [
    {
      name: 'Homes',
      icon: 'aperture',
      link: 'index.html'
    },
    {
      name: 'Features',
      link: 'features.html'
    },
    {
      name: 'About',
      link: 'about.html'
    },
    {
      name: 'Contact',
      link: '#',
      children: [
        {
          name: 'Twitter',
          link: 'https://twitter.com/w_zce'
        },
        {
          name: 'About',
          link: 'https://weibo.com/zceme'
        },
        {
          name: 'divider'
        },
        {
          name: 'About',
          link: 'https://github.com/zce'
        }
      ]
    }
  ],
  pkg: require('./package.json'),
  date: new Date()
}

const clean = () =>{
	return del(['dist','temp'])
}
const style = () => {
	return src('src/assets/styles/*.scss' , { base:'src' })
	    .pipe(sass({ outputStyle:'expanded' }))
	    .pipe(dest('temp'))
}
const script = () => {
	return src('src/assets/scripts/*.js', { base:'src' })
	.pipe(plugins.babel({presets:['@babel/preset-env']}))
	.pipe(dest('temp'))
}
const page = () =>{
	return src('src/**/*.html', { base:'src' })
	.pipe(plugins.swig({data}))
	.pipe(dest('temp'))
}
const image = () =>{
	return src('src/assets/images/**', { base:'src' })
	.pipe(imagemin())
	.pipe(dest('dist'))
}
const font = () =>{
	return src('src/assets/fonts/**', { base:'src' })
	.pipe(imagemin())
	.pipe(dest('dist'))
}
const extra = () =>{
	return src('public/**',{ base:'public' })
	.pipe(dest('dist'))
}
const useref = () => {
	return src('temp/*.html',{base:'temp'})
	.pipe(plugins.useref({searchPath:['temp','.']}))
	.pipe(plugins.if(/\.js$/,plugins.uglify()))
	.pipe(plugins.if(/\.css$/,plugins.cleanCss()))
	.pipe(plugins.if(/\.html$/,plugins.htmlmin({
		collapseWhitespace: true ,
		minifyCSS:true,
		minifyJS:true
		})))
	.pipe(dest('dist'))
}
const serve = () =>{
	watch('src/assets/styles/*.scss',style)
	watch('src/assets/scripts/*.js',script)
	watch('src/**/*.html',page)
	watch([
		'src/assets/images/**',
		'src/assets/fonts/**',
		'public/**'
	],bs.reload)
	/* watch('public/**',extra) */
	
	bs.init({
		notify:false,
		files:'dist/**',
		server:{
			baseDir:['temp','src','public'],
			routes:{
				'/node_modules':'node_modules'
			}
		}
	})
}
const compile = parallel(style,script,page)
const build = series(clean,parallel(series(compile,useref),extra,image,font)) 
const develop = series(compile,serve)
module.exports = {
	build,
	develop,
	clean
}